In Singapore, a project is treated as reconstruction when it goes beyond what the Urban Redevelopment Authority (URA) accepts as additions and alterations. Reconstruction requires planning permission from URA, then building plan approval from the Building and Construction Authority (BCA), with a qualified person (QP) appointed to carry the project through design, supervision and completion. This guide sets out how the definition works, the order of submissions, the QP’s duties and the records that close the project.

TL;DR

• A proposal is reconstruction if it fails the additions and alterations (A&A) criteria. Any increase in storey height or change in the housing form of a landed dwelling is reconstruction, whatever the gross floor area (GFA).
• URA planning permission comes first. A QP then submits building plans to BCA for approval before any building works start.
• Projects follow the CORENET X gateways: G1 Design, optional G1.5 Piling, G2 Construction and G3 Completion.
• The QP must be a registered architect or a Professional Engineer holding a practising certificate. Structural works also need accredited site supervisors, scaled to the value of the works.
• Design for Safety, site records and as-built documentation are part of compliance, not afterthoughts.

Table of Contents

• What counts as reconstruction in Singapore
• The approval sequence before work begins
• The CORENET X gateways
• Who may act as the qualified person
• Design and supervision duties during reconstruction
• Design for Safety in a reconstruction
• Our perspective
• How we support reconstruction projects
• Completion: closing the project properly
• A short planning checklist for owners
• FAQ
• Sources

What counts as reconstruction in Singapore

The first question on any redevelopment of an existing building is classification. It decides which controls apply, how long the process takes and what the design team must prove.

For landed housing, URA’s guidance states that a proposal is reconstruction if it fails the A&A criteria, and any increase in storey height or change in landed dwelling housing form is also reconstruction regardless of GFA. Two practical consequences follow.

1. A modest-looking scheme can still be reconstruction. Raising a storey, or converting a dwelling from one housing form to another, moves the project out of A&A even if the floor area barely changes.
2. Classification should be tested before design is fixed. Discovering at submission that a scheme is reconstruction means revisiting massing, setbacks and structural strategy.

If your project may still qualify as A&A, our guide to BCA approval for A&A works on landed properties explains the lighter route and where the boundary sits. Where a project is clearly reconstruction, the rest of this article applies.

The approval sequence before work begins

Reconstruction in Singapore runs through two main regulators in sequence, with other agencies giving technical clearances along the way.

Step 1: URA planning permission

For a landed-house reconstruction lodgement, Form DC 17 must be submitted before applying to the Building Authority for building plan approval. The same page notes that a QP must be appointed and must obtain technical clearances, including from the Land Transport Authority (LTA). In practice, this means the QP should open the technical clearance conversations while the planning scheme is still being drawn, since a road reserve, access or drainage comment can change the layout.

Step 2: BCA building plan approval

After URA planning permission, a QP must submit building plans to BCA for approval before starting building works. Work that starts on the strength of planning permission alone is not authorized. Our BCA plan submission requirements page walks through the documents and the sequence in more detail, and what requires BCA submission approval helps owners who are unsure whether a particular scope triggers a filing.

Step 3: Other agency submissions

Depending on the building type and scope, fire safety, public utilities, environmental health and industrial estate landlords may also need to review the scheme. Fire safety plans, for example, go to the Singapore Civil Defence Force (SCDF), and our note on who submits plans to SCDF clarifies the responsibility. For a residential retaining structure, which often accompanies landed reconstruction on sloping plots, see the BCA regulations for residential retaining wall design.

The CORENET X gateways

Submissions are now organized around CORENET X. Its three-gateway process lists G1 Design, an optional G1.5 Piling, G2 Construction and G3 Completion, with agency approvals at G1 and G2. The platform is described as a co-creation effort between public agencies and industry to reshape regulatory processes through process re-engineering and technology.

For a reconstruction team, the gateway model changes how the programme is planned:

• G1 Design. The design must be coordinated across disciplines before submission. Architecture, structure, M&E and fire safety information should agree with one another, because agencies review the same package.
• G1.5 Piling. Where deep foundations are involved, the optional piling gateway lets foundation works be considered earlier. This matters on reconstruction sites where the existing structure has to be demolished and new piles installed.
• G2 Construction. Construction-stage approval follows. Structural works require the permit and supervision arrangements described below.
• G3 Completion. Completion requires as-built plans and applications for a Temporary Occupation Permit (TOP) or Certificate of Statutory Completion (CSC).

Larger schemes may involve building information modelling. Our guide on BIM submission for QPs on projects of 5,000 m² and above covers how to prepare a model that passes at the first attempt.

Who may act as the qualified person

The QP is the central figure in every submission. Under the Building Control Act, a QP must be an architect registered under the Architects Act 1991 with a practising certificate, or a professional engineer registered under the Professional Engineers Act 1991 with a practising certificate.

Two points are worth stating plainly for owners.

1. The QP is a person, not a firm. The registration and practising certificate belong to the individual who signs the submission and carries the responsibility.
2. The discipline of the QP follows the scope of the plans. An architect-QP typically takes the architectural submission, while a PE-QP is responsible for structural and geotechnical submissions. A reconstruction normally needs both, and they must coordinate.

A Singapore Professional Engineer also has duties beyond building plan submissions. For temporary structures, for example, MOM has reminded approved scaffold contractors that Professional Engineers design, inspect and certify overhead supports for suspended scaffolds through a Certificate of Inspection, in line with the Workplace Safety and Health (Scaffolds) Regulations. Reconstruction sites rely heavily on propping, shoring, hoarding and scaffolds, so this PE role runs alongside the QP’s permanent works role. Our guide to certifying temporary structures in Singapore explains the process.

Design and supervision duties during reconstruction

The QP’s responsibility does not end at approval. For structural works, the QP appoints the people who watch the site.

Site supervisors

For structural works, site supervisors must be appointed by the QP during the permit application and must be accredited by the Joint Accreditation Committee of the Institution of Engineers Singapore (IES) and the Association of Consulting Engineers Singapore (ACES). The minimum number and classification of Resident Engineers (RE) and Resident Technical Officers (RTO) scale with the total estimated cost of the building works.

The level of supervision follows the value as well: structural works up to $7.5 million require immediate supervision, and works exceeding $7.5 million require full-time supervision, according to the same BCA page. Owners budgeting a reconstruction should price supervision from the permit stage rather than treat it as a late add-on.

A well-built plan maps each supervision requirement to evidence the BCA can check. We set this out in our site supervision plan checklist for Singapore QPs and in the companion piece on mapping every field to evidence in a BCA site supervision plan.

Site records

The QP must also ensure that a 3-month schedule of structural works is kept at the site throughout construction. A schedule that is out of date on an inspection day is a simple and avoidable finding.

Design for Safety in a reconstruction

Reconstruction is where Design for Safety (DfS) earns its place. Existing structures hide unknowns: undocumented alterations, deteriorated members, unexpected loads. Decisions on demolition sequence, temporary support and construction access are made at the design table, long before workers arrive.

The Ministry of Manpower makes the same point: safety outcomes are largely determined during the early design and planning phases, which reinforces the role of DfS in eliminating hazards. For the design team, this translates into a few habits:

• Record the hazards identified at each design review and the design change that removed or reduced each one.
• Design the demolition and temporary works sequence as part of the permanent design, not as a contractor’s afterthought.
• Check that roof and services layouts do not create new work-at-height or access risks for maintenance.
• Hand over residual risks in writing so the contractor and later the building owner can act on them.

Our article on Design for Safety in engineering in Singapore gives a fuller treatment of who carries which duty.

M&E design also deserves early attention in reconstruction. A new roof form or added height can change exposure to lightning, so a lightning protection risk assessment is worth scheduling alongside electrical design rather than after the roof is detailed. Our mechanical engineering compliance list covers the other regulatory checks that M&E teams should run.

Our perspective

Most reconstruction delays we see are not caused by the regulators. They come from three habits that can be corrected early.

The first is classifying late. Owners often sketch a scheme, then learn from the first URA response that a change of storey height or housing form puts it in the reconstruction category. We prefer to test the classification against the URA criteria in the first week, before any drawings are polished.

The second is treating the structural permit as paperwork. Supervision arrangements, site records and inspection plans are conditions of the work itself. Naming accredited supervisors at permit application, and keeping the 3-month schedule current, prevents stoppages that are expensive for a small site.

The third is splitting design and compliance between teams that do not talk. Architecture, structure, geotechnical, M&E and fire safety all feed the same G1 package. When one team revises a level or a slab opening, the others need to know the same day. We run submissions as a single coordinated package for exactly this reason, and we hold ourselves to clear communication and quick turnaround on each agency response.

If an owner asks what to do first, our answer is simple: confirm the classification, appoint the QP early and let the QP’s team plan the whole sequence from URA to CSC.

— Aman

How we support reconstruction projects

AECTechnicalSG provides structural and geotechnical engineering, architectural design, M&E design, temporary works design, PE endorsements and statutory authority submissions to URA, BCA, SCDF, JTC, LTA, PUB and NEA. For reconstruction, that means one team can take the classification check, the QP submissions and the supervision planning together. See the full list on our services page, or read how our PE endorsement and authority submissions work is structured. For budgeting, the structural engineer consultation cost guide explains how consultation fees are typically framed. We do not publish fixed prices, because scope varies by site.

Completion: closing the project properly

Completion is a gateway in its own right. At G3, the QP assembles as-built plans and applies for a TOP or CSC. For many reconstructions, particularly landed houses, the CSC application is the final step, and it depends on digital credentials and a complete record set. Our QP’s CSC application checklist lists what to prepare, including the token requirements that catch teams out.

A practical closing routine:

1. Reconcile the as-built drawings with what was actually built, including any changes approved during construction.
2. Confirm that site records, including the structural works schedule, are complete and consistent.
3. Collect certificates and clearances from each agency involved.
4. Submit the TOP or CSC application through the QP.
5. Hand the owner a package that includes maintenance obligations, such as periodic inspections where they apply. Our pages on BCA periodic structural inspection and facade inspection versus structural inspection explain what follows after handover.

A short planning checklist for owners

• Confirm with a QP whether the scheme is reconstruction or A&A before design is fixed.
• Appoint the QP and ask for the technical clearance list, including LTA, at the start.
• Prepare Form DC 17 for URA, then the BCA building plan submission.
• Price structural supervision from the estimated cost of the works and name accredited supervisors at permit application.
• Plan temporary works and Design for Safety reviews as part of the design programme.
• Keep the 3-month schedule on site and the records current.
• Prepare as-built documentation as the works progress, not at the end.

FAQ

Is a new storey on an existing landed house reconstruction?

Yes. URA’s guidance treats any increase in storey height as reconstruction, regardless of GFA. The same applies to a change in the housing form of a landed dwelling. Confirm the classification with your QP before committing to a design.

Who must submit reconstruction plans to BCA?

A qualified person submits them. The QP must be a registered architect or a registered Professional Engineer with a valid practising certificate. The submission is made after URA planning permission has been obtained.

Does every reconstruction need full-time site supervision?

Not necessarily. BCA ties the level of structural supervision to the value of the works: up to $7.5 million requires immediate supervision, and above that requires full-time supervision. The number and classification of RE and RTO personnel also scale with the cost of the works.

What are the CORENET X gateways?

They are G1 Design, an optional G1.5 Piling, G2 Construction and G3 Completion. Agency approvals sit at G1 and G2, and G3 covers as-built documentation and the TOP or CSC application.

Is Design for Safety only a contractor responsibility?

No. MOM stresses that safety outcomes are largely set during early design and planning, so designers carry real duties. Reconstruction raises the stakes because the existing structure and the temporary works must be considered together.

Sources

• Additions and Alterations to Landed Housing, URA
• Form DC 17, URA
• Building Plan submission, BCA
• CORENET X three-gateway process
• Building Control Act 1989, Singapore Statutes Online
• Site Supervisor requirements, BCA
• Construction site records, BCA
• MOM circular on outriggers and overhead supports
• Minister’s address at the SCAL EHS Campaign, MOM

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• Qualified Person: Duties in Singapore, 7–14 Day Rules + Checklist
• Construction Approval Workflow Singapore: 2026 Guide
• Architecture Approval Step by Step: Singapore 2026 Guide
• Singapore Demolition Permits Mapped, Who to Call and When to Hire a QP